Recognizing Plant Physiology author Jiangzhe Zhao

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Jiangzhe Zhao, co-first author of Phloem unloading via the apoplastic pathway is essential for shoot distribution of root-synthesized cytokinins

Current position: Assistant Professor, College of Life Science and Chemistry, Zhejiang Normal University

Education: BSc in Biological Science and PhD in Botany (Nanjing Agricultural University, NAU)

Non-scientific Interests: Running, Reading, Movies.

Brief Bio: In 2008, I started my PhD in Botany in NAU, in the group of Prof. Wenhua Zhang. My research interest was lipid metabolism in Arabidopsis and soybean. After got my PhD in 2014, I joined in Prof. Kewei Zhang’s group at Zhejiang Normal University. My research interest is phytohormone transportation. In this work, we found that AtABCG14-mediated phloem unloading via the apoplastic pathway is essential for the shoot distribution and long-distance translocation of root-synthesized cytokinins from the root to the shoot through the xylem. We proposed a model that AtABCG14 serves as a cytokinin exporter for both xylem loading and phloem unloading, synchronizing root loading and shoot distribution of root-synthesized cytokinins. This model may represent a generic mechanism for the distribution of other shootward plant growth regulators or nutrients, and this should be explored in the future.

Previously, we have characterized rice OsABCG18 which is responsible for shootward long-distance transport of cytokinins and grain yield (https://doi.org/10.1093/jxb/erz382). In addition, we have set up a new approach for assaying hormone transporter activity using transient expression tobacco system and LC-MS/MS technology. This method will contribute to the functional characterization of phytohormone transporters ( https://doi.org/10.3389/fpls.2021.660966).

姓名：赵江哲

目前职位：讲师，浙江师范大学化学与生命科学学院

教育背景：南京农业大学植物学博士

兴趣爱好：跑步、阅读、电影

 个人简介：

2008年进入南京农业大学章文华教授课题组开启博士生涯，博士期间的主要研究拟南芥和大豆的脂类代谢。2014年博士毕业后加入到浙江师范大学张可伟教授课题组，主要研究植物激素运输的分子机制。本研究揭示了根部合成细胞分裂素被运输到地上组织后的分配机理。我们利用嫁接、同位素示踪、激素测定等经典植物生理学和分子生物学方法研究根源细胞分裂素的分配机制，发现根源细胞分裂素通过导管进入地上组织，先进入筛管进行运输，再通过AtABCG14从木质部伴胞卸载到细胞间隙，然后通过质外体途径进行运输和再分配的分子机制。同时发现细胞分裂素的卸载是长距离运输的关键，地上组织缺失AtABCG14将导致根源细胞分裂素的长距离运输无法进行。该研究对于系统阐明根源细胞分裂素的长距离转运机制具有重要意义。

此外，我们前期工作在水稻中发现一个细胞分裂素转运蛋白OsABCG18并研究其在细胞分裂素长距离转运和产量中的功能(https://doi.org/10.1093/jxb/erz382)。我们还建立了一种利用烟草瞬时表达系统和LC-MS/MS技术测定激素转运蛋白活性的方法，用于筛选新的激素转运蛋白，有助于鉴定新的激素转运蛋白( https://doi.org/10.3389/fpls.2021.660966)。